Telemotor apparatus



W.WAL-LACE. TELEMQTOR APPARATUS. APPLICATION FILED APR-4,1933? Pateiited June 1,1920

' 3 SHEETS-SHEET WILL 1 7/1 i/H-Lhc' w. WALLACE.

TELEMOTbR APPARATUS.

APPLICATION FILED APR- 4 19I-8 1,342,238. Patented June 1,1920.

3 smarts-swan a.

3 MW m m ENHTED STATES rarest WILLIAM WALLACE, OF EDINBURGH, SCOTLAND.

TELEMOTOR APPARATUS.

Application filed April 4, 1918. Serial No. 226,795.

To all whom it may concern:

Be it known that I, I/VILLIAM WVALLAOE, a subject of the King of Great Britain and Ireland, and a resident of Edinburgh, Scotland, have invented a certain newand useful Improved Telemotor Apparatus, of which the following is the specification.

The invention has for its object to provide simple and effective telemotor apparatus for controlling from a central station the movements of a search-light or the like.

Application of telemotor apparatus to this purpose differs from that more usual application to the control of ships steering gear in that in the case of ships steering gear the apparatus is in continuous use for long periods, and therefore elaborate devices for insuring so far as possible that the trans- Initting apparatus and the receiving apparatus remain in consonance one with the other, are necessary, whereas, in the application to apparatus such as a search light which is used intermittently and for comparatively short periods at a time, such elaborate devices are unnecessary if their place be taken by the much simpler arrangements and system which form the subject of the present invention.

The invention relates to that kind of telemotor apparatus in which all automatic valves, automatic by-pass devices, and receiver-returning devices are discarded, and which comprises two telemotors, a transmitter and a receiver, connected in a circuit which during the period of their operation is entirely closed.

According to the invention there is provided a pump and a receiving vessel for charging the system with pressure liquid before it is put in use by way of a series of by-pass pipes which are controlled by manually operated valves all as in certain known apparatus, and there is further provided means for circulating the operating liquid through the system so that it may be rid of air, and to the same end there are pro vided a series of manually controlled airrelease connections.

Preferably, and in order that stufiingboxes and the like apt to leak may be avoided as far as possible,.the teleruotors are of the type in which a double-ended ram operates in a cylinder with closed ends, the ram having on it a rack engaged by a pinion on a spindle passing out through an aperture in the cylinder'casing and connected to an operating handle or tothe gearing moving the search light as the case may be.

In carrying out the invention two sets of this apparatus are applied-one to train and the other to control the elevation of the search light. The transmitters are provided I with pointers moving over scales divided in degrees of elevation and training, and similarscales are provlded on the search light which latter is operatedby any convenient form of gearing from the receivers.

Preferably, there is provided at the transmitting station a sighting device of telescope or other type operatively connected to the transmitter in suchwise that the operator of the transmitter can lay the search light he operates upon any desired target.

The generallay out of an example of the I carrying out of the invention is shown in diagram form in Figure 1 Sheet 1 of two appended sheets of drawings, while in Sheet 2 are shown in detail examples of the construction of the several'parts, Fig. 2 being a sectional elevation of a transmitter for training purposes, Fig. 3 a like view of the upper part of a transmitter controlling elevation, and Fig. i a like view of a receiver for either purpose. Fig. 5 is a broken plan of the operating gear for the search light training receiver, and Fig. 6 is a -broken elevation thereof.

The transmitting and receiving instruments while generically of types known in prior telemotors, differ in those details which adapt them for their specific purpose. As shownin Figs. 2 and 3, the transmitters each consist of a vertical cylinder A in which operate two pistons A A mounted :on the ends of a screwed piston rod A kept 'from turning within the cylinder by a feather A engaging a groove in it. A nut A held, in a recess formed between the halves of the cylinder A engages the rod A This nut A has out about its periphery spur sighting telescope A It is clear that operation of the handwheel A causes conj o1nt and relative movements of the telescope A and of the transmitter pistons A A In the case of the elevating transmitter shown in Fig. 3, the vertical shaft A carries at its upper end a bevel wheel A gearing with a bevel wheel A on. a horizontal shaft A on the ends of which are hand- .wheels A". The shaft A is screwed, and

there engages it a nut A formed with a pointer indicating upon a scale A Air release'plugs A are provided at the upper end of each cylinder for the releaseof occluded air. I

The receivers, of'which one is shown in Fig. 4,'are of the type in which the cylinder "B has within it a piston B on which is formed a rack B and whichis provided at its ends with cup-leathers B B A pinion B engaged by the rack B is mounted in a cavity midway in the cylinder and is carried on a shaft B passing out through a stuflingbox. The shaft B is of course operatively connected to either the training or the elevating gear of the search light as the case ma be.

, be other receiver BB is illustrated in Figs. 5 and 6. As in the one just described,

the cylinder B contains a piston B, on

which is formed a rack B with cup-leathers B and B. A pinion B engaged by the rack is mounted on the shaft B which also carries a gear B of greater diameter. The latter meshes with the quadrant B on the shaft B which passes up through the base B supporting the search'light (not shown) secured to and turning with the shaft B In the diagram Fig. 1 there is shown the lay out of acomplete installation for training and elevating a search light, there being a training transmitter A, an elevating transmitter AA, a training receiver B, and an elevating receiver BB. Main line pipes C connect the opposite ends of the transmitter A with the opposite ends of the receiver B, and similarly the transmitter AA'with the receiver BB. In this circuit are valve box devices D (throughout the diagramall valves are shown open) by which, firstly,

by-pass connection may be made between the two linepipes C, secondly, between these pipes and a pressure chamber E by way of'pipes F, and thirdly between them and a storage tank G by way of pipes H. Valve controlled connection is also provided betweenthe opposite ends of each receiver (B, BB) by way of pipes J, while the pressure chamber E and the storage tank Gare connected by a valve controlled pipe K. Air release valves L are provided on the transmitters and receivers. A pressure gage M, is provided on the pressure chamber E, and a pump of any convenient form is provided which draws from the'storage tank Gr and delivers to the pressure chamber E. As here shown diagrammatically at G this pump is arranged within the storage tank G.

In order to put the apparatus into operating condition, one system-say the elevating system-is cut off from the pressure chamber E and the storage tank Gr. Connection is then made by operation of the valves between the other system and the pressure chamber and storage tank, the pistons of the transmitter A are placed in mid position, the by-pass connection between its opposite ends is closed and all the air-release valves L are opened as is also the by-pass between opposite ends of the receiver B.-

By means of the pump connected to the pressure chamber E, liquid is circulated through the system from and back to the and the system are then closed. The same operation is then performed on the elevating system. 7 v

The latter system having been freed from air, both systems are jointly connected by operation of their several valves to the pressure vessel E, and the pump, drawing from the storage tank Gr, is then operated until a substantial pressure (say 100 lbs. per sq.

in the two systems. The transmitter by- -pass valves are then closed and the apparatus is ready for use.

It is tobe understood that the pipe C which establishes communication between the top of the cylinder A and the left-hand end of cylinder B is not'obstructed by'the closing of the by-pass valve D of cylinder A. 1Vhen the valve is in this position, circulationtakes place as follows :From the pipe F to the bottom of cylinder A, thence by pipe G to the right hand end of cylinder B, thence by bypass J, through the valve D I (which is open), and into the left hand end of cylinder B, .from which the liquid has free passage by pipe 0 to the top of cylinder A. i i

It is to be noted that only one system is freed from air at a time. When the training system has been so freed theconnection between this system and the storage tank and pressure vessel are closed. The

- correspondin connections forthe elevating system are tlen opened and air similarly expelled. Both systems are then conjointly.

connected to the pressure vessel and storage tank, and the pump is operated until the desired pressure exists in 'both systems. Whenever the installation is to be used, the

100 in.) subsists in the pressure vessel and so I valves D of the receiver E are closed; there being no provlslon for leakage losses whlle the search light is actually in use.

WVhat I claim is 1. In a telemotor system, a transmitter, a receiver, a direct, constant and entirely closed circuit operatively connecting the same, in combination with a storage tank, a pump for forcing operating liquid through the system from said storage tank to eliminate air (other than that in solution), together with a pressure vessel connected in the system and with the pump for maintaining in the system a pressure greater than that of the atmosphere, and means for cutting the pump and storage tank out of the system during the operation of the telemotor.

2. In a telemotor system, a transmitter, a receiver, a direct, constant and entirely closed circuit operatively connecting the same, in combination with a storage tank, a pump for forcing operating liquid through the system from said storage tank to eliminate air (other than that in solution), together with a pressure vessel connected in the system and with the pump for maintaining in the system a pressure greater than that of the atmosphere, and means for cutting the pump, storage tank and pressure chamber out of the system during the operation of the telemotor.

3. In a telemotor system, a transmitter, a manually controlled device for operating the transmitter, a sighting device, and an operative connection between the manual operating means and the sighting device for operating the transmitter and sighting device in harmony with each other.

4. In a telemotor system, a transmitter, a sighting device operatively associated therewith, a receiver, an apparatus actuated thereby, together with means for actuating said transmitter to operate thelatter, the sighting device, the receiver and the apparatus moved thereby all in harmony.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses.

WILLIAM WALLACE.

WVitnesses HELEN SUTHERLAND, BERNARD A. HALE. 

